Saw-filing machine



(No Model.) 2 Sheets-Sheet 1.

W. M. BROWN; SAW FILING MACHINE.

Patented Oct. '19, 1897.

n nouns PETERS no. rkoruumo MsumeY-n; n. z:

W. M. BROWN.

SAW FILING MACHINE.

(No Model.)

Patented 0013.19, 1897.

E A w z w mm w w x. NM Q UNITED STATES \VILLIAM MERRILL BROWN,

PATENT OFFICE.

OF MENQMINEE, MICHIGAN.

SAW-FILING MACHINE;

SPECIFICAT ION forming part of Letters Patent No. 591,946, dated 0ctober 19, 1897. Application filed April 30, 1897. Serial No, 634,613. (No model.)

To (LZZ whont it rnm concern.-

Be it known that I, WILLIAM MERRILL BROWN, a citizen of the United States, residing at Menominee, in the county of Menominee and State of Michigan, have invented a new and useful Saw-Filing Machine, of which the following is a specification.

My invention relates to saw-filing machines adapted for use in connection with all kinds of saws, but particularly suited for operation upon handsaws, bucksaws, meat-saws, and.

the like; and the object in view is to provide a simple apparatus adapted to be used with accuracy and facility by an unskilled person, the feeding of the file-guide, after the .preliminary adjustment of the machine, being regulated as to distance to suit the interval between the teeth of the saw.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of a saw-filing machine constructed in accordance with my invention. Fig. 2 is a side view, partly in section, of the file-guide carrying and feeding devices, the feeding-lever being elevated to disengage the clutch from the saw-blade. Fig. 3 is a partial longitudinal section showing the feed-lever depressed and advanced as seen when the car-' rier has been fed forward one step. Fig. 4 is a vertical transverse section in the plane of the feeding-lever. Fig. 5 is a transverse sec-, tion of the clutch. Fig. 6 is a detail .view of one of the clutch-shoes detached; Fig. 7 is a detail horizontal section in the plane of one of the friction or brake devices. Fig. 8 is a detail View in perspective of the file-guide. Fig; 0 is a perspective view of the file-holder inverted. Fig. 10 is a longitudinal section of the same.

Similar numerals of reference indicate corresponding parts in all the figures of the draw- 1ngs. V

1 designates a saw-clamp comprising parallel clamp-bars 2, between which a saw-blade 3 is adapted to be arranged, and U-shaped holding-springs 4, to the arms of which said clamp-bars are attached, and by which said clamp-bars are normally held in contact or pressed toward each other, whereby after a saw has been introduced between the clampbars it is held by the tension of said springs until the apparatus is applied to a vise, or

other equivalent apparatus, in which the clamp is arranged during the operation of filing the saw. The use of a viseis common in this class, and, therefore, I have deemed it unnecessary to illustrate the same in connection with the clamp which forms a part of my invention. I

Carried by the clamp-bars are guides 5,

having inturned lips at their upper edges to engage suitable channels in the. sides of a carrier 6, whereby the carrier is adapted to slide upon the clamp parallel with the sawthe construction illustrated, consists of an spring-plate 9, which is centrally engaged by a holding-screw 10. In the construction illustrated the spring-plate 9 is reinforced by an auxiliary spring 11, which, however, may be omitted when the tension of the spring-plate is sufficient, and at the same time possesses a sufficient yielding quality to allow the pressure-pins 8 to yield when necessary to accommodate irregularities in the surface of the saw-blade.

It will be seen that the adjustable and yielding pressure-pins 7 and 8, respectively, bear against opposite sides of the saw-blade, but are not oppositely located. The adj ustable pressure-pin 7 is preferably arranged between two spaced yielding pins 8, which are preferably used in duplicate, as shown. I also prefer, in practice, to arrange one of these friction devices at each end of the can rier, although it is obvious that this may be varied to suit the size and the conditions of use of the apparatus. 7

Mounted upon the carrier for revoluble adjustment is a file-holder guide 12, of disk shape in plan, and having a circumferential shoulder 13, said guide being fitted in a seat operation of filin g a saw.

formed in the carrier and consisting of a cutaway portion or recess, of which the side walls are shouldered, as shown at 14. The circumferential shoulder of the guide bears upon the shoulders 14 on the walls of the seat, and suitable means, such as set-screws 15, are employed to lock the vguide at the desired rotary adjustment. In'the construction illustrated these set-screws are threaded in the body of the-carrier, and are provided with washers 1 6, which extend inwardly over and bear upon the upper surface of the guide, which is approximately, flush with the upper surface of the carrier. The guide also preferably depends at diametrically opposite points to form extensions 17 in contact with the floor of the seat in the carrier, and the slot 18 which constitutes the file-holder seat is formed in the plane of said extensions.

An important feature of my invention consists of a feeding device for giving the carrier a step-by-step forward movement, the extent of movement being uniform to avoid the necessity of testing the accuracy of its position after each forward movement, and to enable an unskilled person to manipulate the device without the risk of applying the file at other than the proper points.

In order to provide for the adjustment of the feeding devices to suit saws having teeth spaced at different intervals, I preferably em. ploy means whereby the engagement of the feeding-lever is with the saw-blade, and is attained by frictional contact with the side surfaces of the blade rather than by engage ment with the teeth of the saw, which frequently vary, and hence are liable to cause still further irregularity when followed in the In the construction illustrated the feed-lever 19 is provided with a longitudinal slot 20 which operates upon a fixed fulcrum-pin 21, arranged transversely and connected to the lower end of the feedlever is a clutch-lever 22 bent upon itself transversely to form a hood 23, of which the parallel side cheeks are arranged upon opposite sides of the plane of the saw-blade. Pivotally mounted, respectively, on said cheeks of the hood are clutch-shoes 24, having guidelips 25 which are fitted to slide in the carrier-guides 5, and having their clutch-faces arranged in contact, respectively, with opposite side surfaces of the saw-blade. These clutch-shoes are provided upon their-outer sides with cam or beveled surfaces 26, arranged in the paths of the lower edges of the cheeksof the clutch-lever. Hence, when the feed-lever is elevated, as shown in Fig. 2, to remove the clutch-lever from contact with the bevel or cam faces of the clutch-shoes, the clutch is free to move independently of the saw-blade, but the downward pressure of the feed-lever, thus bringing the checks of the clutch-lever in contact with the bevel or cam faces of the clutch-shoes, forces the clamp.- shoes into firm frictional contact with the of said lever.

saw-blade, and thereby prevents the movement of the clutch independently of the sawblade. A pivotal movement of the feed-lever when the clutch is thus locked upon the sawblade will cause the forward feeding movement of the carrier.

From the above description it will be seen that by providing means for limiting the pivotal movement of the feed-lever any desired forward movement of the carrier may be sei cured by a single vibration of the feed-lever. Hence I employalimiting-lever 27, fulcrumed coaxially with the feed-lever, provided with stop-pins 28 to limit the rearward rocking movement of said limiting-lever, and provided at its front end with an adjustable stop 29, adapted to impinge against the upper surface or other fixed part of the carrier, and hence limit the forward rocking movement The adjustable stop 29 is preferably provided with a lock-nut 30, and the limiting-lever is provided with a recess 31 in which the feed-lever operates, whereby said limiting-lever swings with the feed-lever in its pivotal movement without interfering with 'the longitudinal or sliding movement of the feeddever. Hence, in operation, when it is desired to feed the carrier, the feed-lever is elevated to release the clutch from the sawblade, and is then swung rearwardly at its upper end to bring the clutch forward until stopped by the rear end of the carrier.

The feed-lever is then depressed to lock the clutch upon the saw-blade, the rear or fixed stop- ;pins 28 of the limiting-lever being in contact \vith a fixed part of the carrier, and then the feed-lever is advanced at its upper end until ,checked by the contact of the adjustable or front stop-pin with a fixed part of the carrier. By adjusting the stop-pin29 any desired extent of throw may be imparted to the carrier ;by each movement of the feed-lever.

upon the carrier, preferably at its rear end;

In connection with the above described mechanism I use a file-holder consisting of a parallel-sided slide 32, adapted to fit snugly for reciprocation in the seat of the file-guide 12, and having lateral stop-flanges 33 which are adapted to come in contact with the upper surface of said guide to limit the downward movement of the file, and hence cause uniformity in the depth of filing. The slide 32 is hollow, and is open at its lower side for the reception of the file 34, the tang or shank 35 of said file being driven into a suitable handle 36 which is provided. with a journal portion 37, extending through a bearing-38 in therear end of the holder. The outer extremity or point of the file is fitted in a revoluble thimble 39 which is mounted in a longitudinally-adjustable bearing 40 near the outer end of the holder. This adjustable bearing may be secured in the desired position by any suitable means, such as a clamping-nut 41,. engaged with the threaded stem or shank 42 of said bearing, said stem orshank extending through a longitudinal slot 43 in the upper side of the guide, and the bearing being provided with a spring 44. which is constructed and arranged to move the bearing outwardly when said nut 41 is loosened. In this connection a lock-nut 4:5 is also employed to prevent accidental change of adjustment of the nut 41. A spring 46 is also employed in connection with the journal portion of the handle to move said journal portion outwardly when the set-screw 47 is loosened, an additional or looking screw 48 being arranged to impinge against said spring when the desired adjustment has been reached, to secure the file against both transverse and rotary movement in the holder.

From the above description it will be seen that by means of the rotary adjustment of the file-guide the apparatus can be suited to the bevel of the teeth of a saw, and by the adjusting means provided in the holder the file may be arranged to correspond with any pitch and depth of tooth.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is 1. A saw-filing machine having a saw-clamp comprising parallel clamp-bars, means connecting said bars for yieldingly holding them in contact with an interposed saw-blade, and a file-guide carrier mounted upon guides on said clamp-bars, and yieldingly held in engagement with the guides by said connecting means, substantially as specified.

A saw-filin g machine having saw-clamping bars, means connectingsaid bars for yieldingly holding them in contact with an interposed saw-blade, and a file-guide carrier having an interlocking sliding connection with the clamp-bars, and held in operative engagement therewith by the connecting means of said bars, substantially as specified.

3. A saw-filing machine having saw-clampin g bars, means connecting said bars for yieldingly holding them in contact with an interposed saw-blade, and provided respectively with guides having inturned lips, and a fileguide carrier provided in opposite sides with channels to receive the lips of said guides, said lips being held in engagement with the channels by the connecting means of said clamp-bars, substantially as specified.

at. A saw-filing machine having a file guide carrier, feeding mechanism for the carrier, and friction devices having oppositely-disposed fixed and yielding friction pins for bearing terminally upon opposite side surfaces of a saw-blade, substantially as specified.

5. A saw-filing machine having a file-guide carrier, feeding mechanism for said carrier, and friction devices having fixed and yielding friction-pins to bear against opposite side surfaces of a saw-blade, the yielding pin being in duplicate and arranged in planes upon opposite sides of the fixed pin, substantially as specified.

6. A saw-filing machine having a file-guide carrier, feeding mechanism for the carrier, and friction devices consisting of fixed and yielding friction pins to bear terminally against opposite surfaces of a saw-blade, and adjusting devices for varying the tension of pressure of said yielding pins, substantially as specified.

7. A saw-filing machine having a file-guide carrier, feeding mechanism for the carrier, and friction devices consisting of oppositelydisposed fixed and yielding friction-pins to bear against opposite side surfaces of a sawblade, the fixed pin being adjustable, and the yielding pins being carried by a spring-plate, and a set-screw to vary the tension of said spring-plate, substantially as specified.

8. A saw-filing machine having a file-guide carrier, and feeding mechanism embodying oppositely-disposed clutch-shoes adapted to bear against opposite side surfaces of a sawblade and provided with exterior bevel on cam faces, an operating-lever having cheeks to engage said bevel or cam faces, and a feed lever having pivotal and longitudinal movement connected with said operating-lever, substantially as specified.

9. A saw-filin g machine having a file-guide carrier, a feed-lever mounted for pivotal and longitudinal movement upon the carrier, and a clutch adapted to frictionally engage a sawblade and having an arm connected with the feed-lever and capable of swinging movement to engage and release the clutch, substantially as specified.

10. Asaw-filing machinehavingafile-guide carrier, a limiting-lever mounted upon the carrier, a feed-lever mounted upon the pivot of the limiting lever between contiguous shoulders thereof and slotted for longitudinal movement independently of said limiting-lever, means carried by the limiting-lever for controlling the throw thereof in opposite directions, and a clutch operatively connected with the feed-lever and adapted to be engaged and disengaged by longitudinal movement thereof, substantially as specified.

11. A saw-filing machine having a file-guide carrier, a limiting-lever mounted upon the carrier and provided at opposite ends with fixed and adjustable stop-pins, whereby the throw thereof is limited, a feed-lever mounted upon the same pivot as the limiting-lever between contiguous shoulders of said lever, said feed-lever being longitudinally slotted formovement independently of the limitinglever, and a clutch operatively connected with the feed-lever and adapted to be engaged and disengaged by longitudinal movement of the latter, substantially as specified' 12. Asaw-filingmachinehavingafile-guide mounted for movement parallel with a sawblade, and a file-holder having a hollow opensided slide fitted in said guide, and adjustable means carried by the slide for supporting a file in the'open side thereof, substantially as specified. v

13. In a saw-filing'machine,the combination with a file-guide mounted for movement parallel with a saw-blade, of a file-holder having a hollow slide open at one s ide, file-supporting devices mounted upon the slide and provided contiguous to the plane of the open side thereof with seats for terminally receiving a file, and means for securing said filesupporting devices at the desired adjustment, substantially as specified.

14. Inasaw-filing machine,the-combination with a file-guide mounted for movement parallel'with a saw-blade, of a file-holder having a slide fitted in said guide, a bearing carried by the slide, a handle having a journal portion revolubly fitted in said bearing and having a seat for one end of a file, alined opposi-telypositioned set screws terminally arranged in operative relation with the journal portion of the handle, and a second supporting device for the opposite end of the file,

substantially as specified.

15. In a saw-filing machine, the combination with a file-guide mounted for movement parallel with a saw-blade, of a file-holder having a slide fitted in said guide, a bearing carried by the slide, a handle having a circumferentially-grooved journal portion fitted in a bearing and provided with a seat for one end of a file, and a set-screw threaded in the bearing and terminally engaging the circumferential groove of the handle, and clamping devices including a lock-screw alined with and oppositely positioned with relation to the set-screw, and means for supporting the opposite end of the file, substantially as specified.

16. In a saw-filing machine, the combination of a file-guide mounted for movement parallel with a saw-blade, of a file-holder having a slide fitted in said guide, a bearing carried by the slide, a handle having a circumferentially grooved journal portion mounted in said bearing and provided with a j seat for one end of a file, a set-screw mounted Z in the bearing and terminally engaging the a circumferential groove of the handle, a platespring bearing terminally against the journal 2 j tion with a file-guide mounted for movementportion of the handle at the opposite side from said set 'screw to hold the former in' yielding contact with the latter, a lock-screw terminally impinging against the spring for clamping the latter in frictional contactwith the handle, and means for supporting the-opposite end of the file, substantially as specified.

17. In a saw-filing machine, the combina parallel with a saw-blade, of a fileholder having a slide fitted in said guide, bearings carried by the slide, a handle r'evolubly fitted in one of the bearings and provided with a. seat for one end of a file, a thimble removably fitted'in the other bearing and provided with a seat for the other end of the file, and means for locking the handle at the desired rotary adjustment in its bearing, substam tially as specified.

18. In a saw-filing machine, thecombination with a guide adapted to be arranged in the desired position with relation to a sawblade, of a file-holderhaving a hollow opensided slide adapted'to fit in said guide and provided at one end with a fixed bearing, a ham dle having a journal portion mounted in said bearing and provided with a seat foroneend of a file, an adjustable bearing mounted for movement parallel with the slide, means for securing the adjustable bearing in a fixed position, a thimble mounted for rotary adjustment in the adjustable bearing and adapted to receive the other end of a file, springs arranged in operative relation with said adjustable bearing and the journal portion of the handle, a set-screw mounted in the fixed bearing to impinge terminally upon the journal portion of the handle, and a lockscrew to bear in the opposite'direction against the journal portion of the handle, substan- I tially as specified.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in Ithe presence of two witnesses.

W'ILLIAM MERRILL BRO\V N.

Witnesses HENRY W. PARKER, CHAS. W. HUTCHINSON.

alum 

